Android -- 倒计时Button的实现

1、自定义Button类

public class CountDownButton extends android.support.v7.widget.AppCompatButton implements View.OnClickListener {    private Context mContext;    private OnClickListener mOnClickListener;    private Timer mTimer;//调度器    private TimerTask mTask;    private int temp_duration;    private int countDownTime = 60000;//默认需要倒计时的时间毫秒数    private String countDownText;//倒计时之后的文字显示    private String countDowningFormat ;//正在倒计时时要显示的格式    public CountDownButton(Context context) {        super(context);        init(context, null);    }    public CountDownButton(Context context, AttributeSet attrs) {        super(context, attrs);        init(context, attrs);    }    private Handler mHandler = new Handler(){        @Override        public void handleMessage(Message msg) {            String text = String.format(countDowningFormat, temp_duration / 1000);            CountDownButton.this.setText(text);            temp_duration -= 1000;            if (temp_duration < 0) { //倒计时结束                CountDownButton.this.setEnabled(true);                CountDownButton.this.setText(countDownText);                stopTimer();            }        }    };    private void init(Context context, AttributeSet attrs) {        this.mContext = context;        countDowningFormat = "重新获取(%d)";        countDownText = "重新获取";        if(null != attrs){            TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.CountDown);            countDownTime = array.getInt(R.styleable.CountDown_countDownTime, 0);            countDownText = array.getString(R.styleable.CountDown_countDownText);            if(!TextUtils.isEmpty(array.getString(R.styleable.CountDown_countDowningFormat))){                countDowningFormat = array.getString(R.styleable.CountDown_countDowningFormat);            }            array.recycle();        }        setOnClickListener(this);    }    @Override    public void setOnClickListener(OnClickListener onClickListener) {//提供外部访问方法        if (onClickListener instanceof CountDownButton) {            super.setOnClickListener(onClickListener);        } else {            this.mOnClickListener = onClickListener;        }    }    @Override    public void onClick(View view) {        if (mOnClickListener != null) {            mOnClickListener.onClick(view);        }        startTimer();    }    //计时开始    private void startTimer(){        temp_duration = countDownTime;        CountDownButton.this.setEnabled(false);        mTimer = new Timer();        mTask = new TimerTask() {            @Override            public void run() {                mHandler.sendEmptyMessage(0x01);            }        };        mTimer.schedule(mTask, 0, 1000);//调度分配，延迟0秒，时间间隔为1秒    }    //计时结束    private void stopTimer(){        if (mTask != null) {            mTask.cancel();            mTask = null;        }        if (mTimer != null) {            mTimer.cancel();            mTimer = null;        }    }}

2、Layout使用

3、values attrs.xml文件中自定义属性

<?xml version="1.0" encoding="utf-8"?>

参考：

https://www.oschina.net/code/snippet_1187615_49484

http://blog.csdn.net/chengxu_hou/article/details/54972502

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